The AirTAC GFR300C15MLJC2WTK AirTAC Filter Regulator NPT1/2 is a genuine G-series filter regulator: water separation, 40 µm particulate filtration and balanced-type pressure regulation combined in a single body. It has See datasheet ports, a differential-pressure drain and regulates 0.15 - 0.9 MPa (20 - 130 psi). It does not lubricate — add a GL lubricator, or order the GFC two-unit set, if downstream equipment needs oil.
The AirTAC GFR300C15MLJC2WTK is a size-300 filter regulator: water and particulate filtration plus downstream pressure regulation in a single body. This configuration is built around a 1/2 in NPT port, a 5 um filter element (the finer of the two catalogue grades), a manual drain for controlled bowl purging, and a low-pressure regulator type for circuits that run below standard regulator settings. It carries a round pressure gauge reading in psi, a reverse/check valve to hold downstream pressure, and a metal bowl. Maximum working (inlet) pressure is 1.0 MPa (145 psi), and the operating temperature range is -5 to 70 C (non-freezing).
This is a genuine AirTAC part. The GFR family spans sizes 200, 300, 400 and 600 with port sizes from 1/8 in to 1 in, and is ordered with your choice of drain type, filter grade, gauge style and scale, thread (PT standard, with G and NPT as catalogue options), bracket, and reverse valve. Because AirTAC publishes flow as curves rather than a single rated figure, we confirm the datasheet and flow figures for your application on request.
| Model | GFR300C15MLJC2WTK AirTAC Filter Regulator NPT1/2 |
|---|---|
| Series | GFR300 filter regulator |
| Port size | See datasheet (PT thread) |
| Filtering grade | 40 µm |
| Regulating range | 0.15 - 0.9 MPa (20 - 130 psi) |
| Pressure type | Standard type |
| Adjusting mechanism | Balanced type |
| Fluid | Compressed air |
|---|---|
| Max. working pressure | 1.0 MPa (145 psi) |
| Temperature range | -5 to +70 °C (unfreeze) |
| Drain type | Differential-pressure drain |
| Bowl material | PC |
| Pressure gauge | Fitted — factory standard, Factory standard scale |
| Reflux valve | Not fitted |
Specifications follow the official AirTAC G-series air-preparation data. The regulating band is set by the drain type: automatic and differential-pressure drains regulate 0.15 - 0.9 MPa, a manual drain regulates 0.05 - 0.9 MPa. Standard type, regulating 0.15 - 0.9 MPa (20 - 130 psi). Air must not freeze in the unit. Flow curves, weight and outline dimensions are not published in our data set — ask us and we will confirm from the factory datasheet.
| GFR300 | G-series filter regulator, 300 body — sets the port range. |
|---|---|
| C1 | Port size See datasheet. This body offers 08 = PT1/4", 10 = PT3/8", 15 = PT1/2". |
| (blank) | Drain: Differential-pressure drain — this also sets the regulating band (0.15 - 0.9 MPa (20 - 130 psi)). |
| (blank) | Standard type. Blank is standard, L is the low-pressure type. |
| (blank) | Mounting bracket included. |
| (blank) | Pressure gauge fitted (blank). |
| (blank) | Gauge shape: Factory standard. C is round, F is square. |
| (blank) | Gauge scale: Factory standard. 1 is MPa, 2 is psi, 3 is bar. |
| (blank) | Filtering grade 40 µm. Only 40 µm (blank) and 5 µm (W) exist. |
| (blank) | PT thread. PT is the default; G is BSPP and T is NPT. |
| (blank) | No reverse-flow valve (the default). |
Field order is size, port, drain, type, bracket, gauge, shape, scale, grade, thread, reflux — a blank position takes the default. Example: GFR300-08 is a 300 body, PT1/4", differential drain, standard type, bracket included, gauge fitted, 40 µm, PT thread, no reflux valve.
A larger body carries a larger port and holds set pressure better as flow rises. AirTAC publishes flow only as curves, so size the body from your peak demand with headroom. The GFR600 uses an aluminium-alloy bowl; the 200, 300 and 400 bodies use PC.
| This model | GFR300 · See datasheet · 40 µm |
|---|---|
| One size down | GFR200 |
| One size up | GFR400 |
| Add lubrication | GFC300-C1 (two-unit set) |
On a CNC machining cell, this unit filters the shop air to 5 um and holds a reduced, low-pressure setting for clamping actuators, with the psi gauge letting operators verify clamp circuit pressure at a glance and the check valve holding the setting between cycles.
For a laboratory or test-rig bench supplied from a plant air ring main, the 5 um element protects sensitive instruments from water and particulate while the low-pressure regulator type brings the supply down to the gentle pressures such work needs, drained manually between sessions.
At a packaging line drop feeding low-pressure actuated gates and guides, this filter regulator cleans the compressed air, keeps the regulated supply from creeping back up via the reverse valve, and its metal bowl with manual drain suits a line purged on a fixed maintenance schedule.
Start with the port step: this unit is the size-300 body with a 1/2 in NPT port, so size up to 400 or 600 if your line may need more flow later, or down to 200 if space is tight. Choose the drain to match maintenance reality: manual (as here) means an operator opens the drain at intervals, while automatic and differential-pressure drains purge themselves. The 5 um element (code W) suits instruments and finer pneumatic components; the 40 um standard element suits general shop-air protection. Gauge scale is selectable (MPa, psi or bar) and either an embedded square gauge or an external round gauge can be specified; this unit carries the round gauge in psi. Thread is PT as standard, with G (BSPP) and NPT as order options, and the bracket position lets you order with or without a mounting bracket. One honest note on sizing: AirTAC publishes flow as curves, not a single rating, so ask us to confirm the flow figures against your application before you order.
Quick checklist
The PC bowl must not be cleaned with solvents — wipe it with a dry cloth. Without the K option, air cannot flow back through the unit. A filter regulator adds no oil to the line.
AirTAC publishes flow for the GFR series as curves rather than a single rated figure, so there is no one rated flow number we can honestly quote. Send us your application details and we will confirm the flow figures from the datasheet for this 1/2 in port size before you order.
The M in the code selects the manual drain: an operator opens the drain to purge accumulated water from the metal bowl at set intervals, rather than the bowl purging itself as with the automatic or differential-pressure drain options. It is a straightforward choice for lines visited on a regular maintenance round; if unattended operation matters, ask us about the automatic-drain variant of the same size.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity, thread type (PT / G / NPT), gauge scale and destination. We confirm price, availability and lead time — usually within 7-8 hours.